Solid electrolytic capacitor having an anode terminal and a cathode terminal formed from a single metal plate and method for manufacturing same

Abstract

A solid electrolytic capacitor includes a porous sintered body, a metal lead, a dielectric layer, a solid electrolyte layer, a first terminal, and a second terminal. The porous sintered body has a pair of main faces opposed to each other, a pair of side faces opposed to each other, and a pair of end faces opposed to each other. The metal lead is extended from one of the pair of main faces. The first terminal includes a first terminal mounting part extending in substantially parallel to each of the pair of side faces, and a pair of arm parts extending in substantially parallel to each of the pair of end faces. The pair of arm parts are opposed to each other. The second terminal includes a terminal connecting part electrically connected to the solid electrolyte layer. The metal lead is electrically connected to each of the pair of arm parts.

What is claimed is: 
     
       1. A solid electrolytic capacitor comprising:
 at least one porous sintered body having a pair of main faces opposed to each other, a pair of side faces opposed to each other, and a pair of end faces opposed to each other; 
 a metal lead partly embedded in the at least one porous sintered body, the metal lead extending from one of the pair of main faces; 
 a dielectric layer disposed on a surface of the at least one porous sintered body; 
 a solid electrolyte layer disposed on the dielectric layer; 
 a first terminal electrically connected to the metal lead; and 
 a second terminal electrically connected to the solid electrolyte layer, wherein: 
 the first terminal includes a first terminal mounting part, a pair of arm parts opposed to each other, and a bent part disposed between the first terminal mounting part and the pair of arm parts, the first terminal mounting part extending in substantially parallel to each of the pair of side faces, the pair of arm parts extending in substantially parallel to each of the pair of end faces, 
 the second terminal includes a terminal connecting part and a second terminal mounting part, the terminal connecting part being electrically connected to the solid electrolyte layer, the second terminal mounting part extending in substantially parallel to each of the pair of side faces, 
 the metal lead is in direct contact with each of the pair of arm parts while being sandwiched between the pair of arm parts, and is electrically connected to each of the pair of arm parts, and 
 a gap between the pair of arm parts is configured to be uniform so that the metal lead sandwiched between the pair of arm parts is in direct contact with each of the pair of arm parts at any position in an extending direction of the pair of arm parts. 
 
     
     
       2. The solid electrolytic capacitor according to  claim 1 , wherein the metal lead is disposed away from the bent part of the first terminal. 
     
     
       3. The solid electrolytic capacitor according to  claim 1 , wherein:
 the pair of arm parts of the first terminal have a pair of connection surfaces opposed to each other, each of the pair of connection surfaces being connected to the metal lead, and 
 the each of the pair of connection surfaces has irregularities. 
 
     
     
       4. The solid electrolytic capacitor according to  claim 1 , wherein
 the at least one porous sintered body includes a plurality of the porous sintered bodies. 
 
     
     
       5. The solid electrolytic capacitor according to  claim 1 , wherein an area of the pair of end faces is smaller than an area of the pair of side faces. 
     
     
       6. The solid electrolytic capacitor according to  claim 1 , wherein the metal lead is welded to each of the pair of arm parts while being sandwiched between the pair of arm parts. 
     
     
       7. The solid electrolytic capacitor according to  claim 1 , wherein each of the pair of arm parts has an L shape. 
     
     
       8. The solid electrolytic capacitor according to  claim 1 , wherein each of the pair of arm parts has an L shape, wherein the L shape includes a short arm and a long arm, and the metal lead is in direct contact with the long arm.